ocnbrze and EarlyMon, thanks guys, I appreciate the suggestions and comments! FWIW, after I looked at the instructions for installing new firmware, given S-ON, I decided to first do a re-download and try a re-install of Viper (ocnbrze's first suggestion) even with my supposed "old" radios. I was pleasantly surprised to find first that the reinstall eliminated the "Unfortunately, settings has stopped" error, and even more importantly, the install seemed to go just fine, and I now seem have everything up and running.
I'm not sure what I might have seen given my old radios combined with the Viper install, but things seem to working great - calls, 3G data, GPS, Wifi, nothing seems amiss. So with that I'll assume I'm good.
Thanks so much for chiming in...these forums, and the time contributions you guys make are really amazing....